Screw Torque Calculator

Calculate Screw Torque







Formula

The formula to calculate the screw torque is:

\[ T_s = K \cdot F \cdot d \cdot \left(1 - \frac{L}{100}\right) \]

Where:

What is Screw Torque?

The screw torque is the amount of torque required to tighten a screw or bolt. It is calculated based on the material constant, the diameter of the bolt, the axial bolt force, and the percentage of force lost due to lubrication.

Example Calculation 1

Let's assume the following values:

Using the formula:

\[ T_s = 0.2 \cdot 100 \cdot 0.25 \cdot \left(1 - \frac{10}{100}\right) = 0.2 \cdot 100 \cdot 0.25 \cdot 0.9 = 4.5 \text{ lb-ft} \]

The Screw Torque is 4.5 lb-ft.

Example Calculation 2

Let's assume the following values:

Using the formula:

\[ T_s = 0.15 \cdot 150 \cdot 0.5 \cdot \left(1 - \frac{5}{100}\right) = 0.15 \cdot 150 \cdot 0.5 \cdot 0.95 = 10.6875 \text{ lb-ft} \]

The Screw Torque is 10.6875 lb-ft.